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The mechanics of Dispel/Remove magic
There are several threads in this forum about the spells Dispel Magic and Remove Magic, but AFAIK none of them covers in depth their mechanics.
I have gathered information about these spells from several places and this is what I got:
- In spite of what the description says, low level casters don’t have a 1% chance of dispelling effects from high level casters. Their chance is actually 0.
- Both spells display the message "Dispel Effects" in the combat log and a visual effect even if nothing gets dispelled.
- Some magic effects are not dispellable. This include deafness, poison, stun, swarmed (from Summon Insects), bad luck (from Wish), decaying (from Dolorous Decay), doom, greater malison, held, magic resistance lowered, miscast magic, silence, unconsciousness, spell failure (from Insect Plague), and spell protections like Spell Turning or Spell Deflection.
- The target's Magic Resistance, if any, does not affect this spell.
- The only way to protect from these spells is using Spell Immunity: Abjuration.
- When they are cast on a target affected by magic effects from several casters, the chance of dispelling is calculated separately for the effects created by each caster. The chances of dispelling the effects created by a high level caster are lower than the chances of dispelling the effects created by a low level caster even if they are all present in the same character.
Is this correct?
Even if the last point is correct, it is unclear how many rolls are made when one of these spells hits a creature. For example, let's say a creature has four buffs, two from one allied mage and the other two from another one. Then an enemy mage casts Remove Magic on the creature. Is there a single roll for all four buffs? Or two rolls, one for the buffs of the first mage and another one for the buffs or the second mage? Or four rolls, one for each effect?